The main advantage of using spears is their long reach. With practice and plenty of room to move, it is possible to attack enemies and be out of range of most of their return attacks.

Gaining levels in the Spear skill also contributes to raising Endurance when leveling up. Using a Spear a lot in the early game can allow you to max out Endurance early, giving you more total Health in the long run.

Although the Spear skill is 'governed' by Endurance, like all melee weapons they use Strength to influence damage dealt and Agility to influence the chance of hitting.

Spears

This is a list of base spears. A complete list of spear-style weapons, including enchanted and unique ones, is also available.

The spear is a common weapon for light irregular troops and militias, but has been developed as a martial art form by the Bosmer. In Morrowind, the Ashlanders favor a wicked and elegant version of the spear, with a spike at the foot of the shaft. - Garothmuk gro-Muzgub

Halberd - The long reach and high efficiency of this two-handed long-shafted axe-like weapon makes it well-suited for combat with encumbered, heavily armored opponents. Using this weapon in massed formations requires a high degree of skill and training, and its bulk makes it difficult to use in close quarters, so the weapon is, with significant exceptions, neither common nor popular for use by mercenaries or adventurers. - Garothmuk gro-Muzgub